Ignition timing device



Aprifi 3Q, 1935. M/MALLORY IGNITION TIMING DEVICE Filed Sept. 6, 1952Patented Apr. 30, 1935 manifold to cause when the engine closed.

Marion Mallory,

Mal corporation of Claims.

The object of this invention is to provide a praccal ignition timing deThe der contains a piston l2 nnected with the timer 9.

{currence of a sufiicient degree of Detroit, Mich assignor to The loryResearch Company, Toledo. Ohio, a

Delaware Application September 6, 1532, Serial No.

A spring l4 within the cylinder l0 urges the piston [2 toward the headI561 the cylinder to hold the timer in spark retarded position.

vacuum in the chamber 8, however, the piston I 2 will be drawn away fromthe head in opposition to the spring Hi to advance the spark. In theoperation of the invention, it will be according to the load, eration;

It is apparent that the construction of the invention may beconsiderably modified without departing from the scope of the appendedclaims,

the essentialfeature being the control of the communication between thetimer connection and the intake manifold in accordance with the positionof the throttle valve.

What I claim is:-

1. In an internal combustion engine; the combination of a timer, a fuelintake passageway, two throttle valves spaced apart in series in saidpassageway, simultaneous and similar movement of both valves, and asuction controlled means of the timer, said last mentioned means beingconnected with said passageway between the two throttle valves.

' 2. The combination with the intake manifold, timer and a throttlevalve of an internal combustion engine, of a suction chamber connectedto the intake manifold between said throttle valve and the engine, meansmovable by a predetermined suction in said chamber to advance the timer,said chamber being in free communication with the intake manifold whenthe throttle valve is open, and means for cutting off said communicationto substantially the same extent that the throttle is closed.

3. The combination with the intake manifold of an internal combustionengin a fuel passageway leading to said manifold, a throttle valve insaid passageway, suction chamber having tree communication withmentioned means and of a' said passageway between said valve and themanifold, means movable by a predetermined suction in said chamber toadvance the timer, said passageway having free communication with theand means for substantially closing communication between saidpassageway and the manifold when the throttle valve is in idlingposition. v

4. The combination with the intake manifold of an internal combustionengine, Way leading to said manifold, and an timer, of two throttlevalves spaced apart in series in said passageway and movable in unisoneither to an open or an idling position, a cylinder in communicationwith said passageway between the two valves, and a piston operable bysuction "said cylinder to advance the timer.

5. The combination with the intake manifold, the timer and a throttlevalve of an internal combustion engine, of suction operable meansconnected to the intake manifold between said throttle valve and themotor to advance the timer, and means operable in unison with saidthrottle valve to open co tially the same extent that said throttlevalve is opened,

MARION MALLORY.

